
MVTX2603
Data Sheet
60
Zarlink Semiconductor Inc.
QOSC39 through QOSC36 represents one set of WFQ parameters for a 10/100 port. There are four such sets of
values. The granularity of the numbers is 1, and their sum must be 64. QOSC39 corresponds to W3 and QOSC36
corresponds to W0.
QOSC36[7:6]: Priority service type for the ports select this parameter set. Option 1 to option 4
QOSC37[7]: Priority service allow flow control for the ports select this parameter set
QOSC37[6]: Flow Control pause best effort traffic only
13.6.34 Classes WFQ Credit Port G1
Accessed by serial interface (R/W)
W0 - QOSC40[5:0] – CREDIT_C0_G1 (CPU Address 53F)
[7:6] - Priority service type. Option 1 to 4.
W1 - QOSC41[5:0] – CREDIT_C1_G1 (CPU Address 540)
[7]: Priority service allow flow control for the ports select this parameter set.
[6]: Flow Control pause best effort traffic only
W2 - QOSC42[5:0] – CREDIT_C2_G1 (CPU Address 541)
W3 - QOSC43[5:0] – CREDIT_C3_G1 (CPU Address 542)
W4 - QOSC44[5:0] – CREDIT_C4_G1 (CPU Address 543)
W5 - QOSC45[5:0] – CREDIT_C5_G1 (CPU Address 544)
W6 - QOSC46[5:0] – CREDIT_C6_G1 (CPU Address 545)
W7 - QOSC47[5:0] – CREDIT_C7_G1 (CPU Address 546)
QOSC40 through QOSC47 represents the set of WFQ parameters for Gigabit port 24. The granularity of the
numbers is 1 and their sum must be 64. QOSC47 corresponds to W7 and QOSC40 corresponds to W0. In the 2G
trunk configuration, the sum of all values QOSC40 through QOSC47 must equal 128.
13.6.35 Classes WFQ Credit Port G2
Accessed by serial interface (R/W)
W0 - QOSC48[5:0] – CREDIT_C0_G2 (CPU Address 547)
[7:6] - Priority service type. Option 1 to 4.
W1 - QOSC49[5:0] – CREDIT_C1_G2 (CPU Address 548)
[7]: Priority service allow flow control for the ports select this parameter set.
[6]: Flow Control pause best effort traffic only
W2 - QOSC50[5:0] – CREDIT_C2_G2 (CPU Address 549)
W3 - QOSC51[5:0] – CREDIT_C3_G2 (CPU Address 54a)
W4 - QOSC52[5:0] – CREDIT_C4_G2 (CPU Address 54b)
W5 - QOSC53[5:0] – CREDIT_C5_G2 (CPU Address 54c)
W6 - QOSC54[5:0] – CREDIT_C6_G2 (CPU Address 54d)
W7 - QOSC55[5:0] – CREDIT_C7_G2 (CPU Address 54e)
QOSC48 through QOSC55 represents the set of WFQ parameters for Gigabit port 25. The granularity of the
numbers is 1, and their sum must be 64. QOSC55 corresponds to W7 and QOSC48 corresponds to W0. In the 2G
trunk configuration, the sum of all values QOSC48 through QOSC55 must equal 128.